Biology: Skin Structures and Functions Quiz
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Questions and Answers

What is the primary function of keratin?

  • Helps form the hair, nail and skin (correct)
  • Provides immunity and disease resistance
  • Undergoes mitosis in the epidermis
  • Secretes melanin to absorb UV light
  • Which type of cell in the epidermis helps prevent water loss and inhibit bacterial growth on the skin surface?

  • Tactile epithelial cells
  • Melanocytes
  • Arrector pili
  • Sebaceous gland (correct)
  • What is another name for the subcutaneous layer of the skin?

  • Dermis
  • Stratum corneum
  • Melatonin
  • Hypodermis (correct)
  • Which layer of the epidermis is composed of a keratinized stratified squamous epithelium?

    <p>Stratum basale</p> Signup and view all the answers

    Which pigment secreted by specialized cells in the skin is capable of absorbing ultraviolet light?

    <p>Melanin</p> Signup and view all the answers

    Which layer of the epidermis is the site of cell division?

    <p>Stratum basale</p> Signup and view all the answers

    Which layer of the epidermis contains lamellar granules?

    <p>Stratum granulosum</p> Signup and view all the answers

    Which type of exocrine gland is connected to a hair follicle?

    <p>Sebaceous gland</p> Signup and view all the answers

    Which layer of the epidermis is only present in thick skin?

    <p>Stratum lucidum</p> Signup and view all the answers

    Which skin condition is characterized by inflammation of hair follicles and sebaceous glands caused by bacterial infection?

    <p>Boils and carbuncles</p> Signup and view all the answers

    In which degree of burn are the epidermis and upper dermis damaged, resulting in blisters?

    <p>Second-degree burn</p> Signup and view all the answers

    Why are facial burns considered critical?

    <p>Can cause swelling and suffocation</p> Signup and view all the answers

    Which type of skin cancer is the most common?

    <p>Basal cell carcinoma</p> Signup and view all the answers

    Which condition causes depigmentation patches in the skin?

    <p>Vitiligo</p> Signup and view all the answers

    Which structures in the skin detect touch sensations?

    <p>Free nerve endings</p> Signup and view all the answers

    Which layer of the skin is known as the 'true skin'?

    <p>Dermis</p> Signup and view all the answers

    Which structures are deep pressure receptors in the skin?

    <p>Pacinian corpuscles</p> Signup and view all the answers

    What is the main component of the hypodermis layer of the skin?

    <p>Dense irregular connective tissue</p> Signup and view all the answers

    Which term refers to the redness of skin due to fever, allergic reactions, and infections?

    <p>Erythema</p> Signup and view all the answers

    Which condition is characterized by the inability to produce melanin?

    <p>Vitiligo</p> Signup and view all the answers

    Which of the following is NOT a characteristic of thick skin?

    <p>Located in the dermis layer</p> Signup and view all the answers

    Which structure in the skin plays an important role in thermoregulation?

    <p>Sweat glands</p> Signup and view all the answers

    What are nails considered to be?

    <p>Scale-like modifications of the epidermis</p> Signup and view all the answers

    Which gland is connected to a hair follicle?

    <p>Sebaceous gland</p> Signup and view all the answers

    Which condition is characterized by paleness of the skin, often seen in shock or anemia?

    <p>Pallor</p> Signup and view all the answers

    Which of the following is NOT a homeostatic contribution of the skin?

    <p>Help activate vitamin B</p> Signup and view all the answers

    What causes the formation of 'goose bumps' on the skin?

    <p>Action of arrector pili muscles</p> Signup and view all the answers

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